Paper Title:
Variation Mechanism of Aspiration Pressure at the Tip of Metal Delivery Tube in Supersonic Atomization
  Abstract

The aspiration pressure variation at the tip of metal delivery tube in the supersonic atomization nozzle during gas-only atomization performance had been investigated in this work. The results reveal that the aspiration pressure is subambient at all operating pressures. A general trend is that with increasing atomization gas pressure, the value of aspiration pressure decreases at P0 between 0.5 and 1.5MPa, then increases as P0 ranges from 1.5~3.5MPa, finally decreases again at higher gas pressure (P0>~3.5MPa). When P0>2.0MPa, as the included angle α augments, the aspiration pressure ΔP increases. Meanwhile, the change range of aspiration pressure ΔP significantly enlarges when the jet included angle α raises from16 to 28º. The lager is the apex angle β of metal delivery tube, the greater is the aspiration pressure ΔP. And as the protrusion length of melt delivery tube h increases, the aspiration pressure ΔP decreases gradually.

  Info
Periodical
Materials Science Forum (Volumes 675-677)
Edited by
Yi Tan and Dongying Ju
Pages
1049-1052
DOI
10.4028/www.scientific.net/MSF.675-677.1049
Citation
X. M. Zhao, J. Xu, X. X. Zhu, S. M. Zhang, "Variation Mechanism of Aspiration Pressure at the Tip of Metal Delivery Tube in Supersonic Atomization", Materials Science Forum, Vols. 675-677, pp. 1049-1052, 2011
Online since
February 2011
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